Wierd application, hypothetical question.

Wed Dec 6 16:09:38 GMT 2000

I assume that maybe by voice coil actuators you mean as in speakers? Either 
way, .5 to 1" of stroke for an electormechanical solenoid really is asking 
for too much if you need any considerable force. I could dig out some of the 
charts relating to stroke vs force that I have hiding but I don't see it 
happening.
if it were .25 to .33 or so, you might be able to get away with it.
Justin

>From: "Shirley, Mark R" <MarkRShirley at eaton.com>
>Reply-To: diy_efi at diy-efi.org
>To: "'diy_efi at diy-efi.org'" <diy_efi at diy-efi.org>
>Subject: RE: Wierd application, hypothetical question.
>Date: Wed, 6 Dec 2000 09:45:22 -0500
>
>Okay, looks like this needs to be a pneumatic job.  I found some info
>on Voice coil actuators, and the strokes are too small.  From 0 to 
>0.25inch.
>Oh well.  It still would have been cool to program one.
>
>-----Original Message-----
>From: Shirley, Mark R [mailto:MarkRShirley at eaton.com]
>Sent: Wednesday, December 06, 2000 8:20 AM
>To: 'diy_efi at diy-efi.org'
>Subject: RE: Wierd application, hypothetical question.
>
>
>Well, stroke appears to be in the vicinity of 1/2 - 1 inch.  Force reqd, I
>don't
>know yet.  I have a few spare pumps, I'll have to back a screw out and
>insert a
>tension gage.  I think the solenoid is not the hard part, but the control
>circuit.
>Something to take in Map voltage(assume a GM map sensor), IAT, and produce 
>a
>PWM output
>proportional to the input map voltage.  IAT would be a modifier maybe.
>Depending
>on the force required, will determine amperage I think.  Like I said,
>programming is
>not the problem.  Control circuitry is.
>
>-----Original Message-----
>From: justin ivan [mailto:vlkslvr at hotmail.com]
>Sent: Tuesday, December 05, 2000 5:10 PM
>To: diy_efi at diy-efi.org
>Subject: RE: Wierd application, hypothetical question.
>
>
>Like I said, I don't know that much about propane on diesels just know that
>on turbos it makes a hell of a difference.
>Might be able to us an adjutable wastegae controll modified for your
>purposes. I guess to reall be able to help you (even if it were solenoid
>operated) it would help if you had an idea of the stroke vs force required
>for the pump.
>Justin
>
>
> >From: "Shirley, Mark R" <MarkRShirley at eaton.com>
> >Reply-To: diy_efi at diy-efi.org
> >To: "'diy_efi at diy-efi.org'" <diy_efi at diy-efi.org>
> >Subject: RE: Wierd application, hypothetical question.
> >Date: Tue, 5 Dec 2000 15:54:06 -0500
> >
> >I am doing propane as well.  Propane tends to not work very well on a NA
> >diesel,
> >since you have little excess air to begin with.  Propane works on a
> >Turbodiesel
> >so well since you have an abundance of excess air, even if it is lower
> >density.
> >I have many SAE papers on this, and that was the consensus.
> >
> >I hadn't thought of a wastegate controller.  There is still the dilemma 
>of
> >creating
> >a boost bellows system.
> >
> >-----Original Message-----
> >From: justin ivan [mailto:vlkslvr at hotmail.com]
> >Sent: Tuesday, December 05, 2000 3:11 PM
> >To: diy_efi at diy-efi.org
> >Subject: RE: Wierd application, hypothetical question.
> >
> >
> >Pat ,
> >You raise an intersting point about a waste gate controller. Now did you
> >mean an electronic version (Ala Apex i AVCR) or a regular mechanical 
>waste
> >gate actuator? Either would work well.
> >I agree with you notion of this being necessary at all, if it was deemed 
>so
> >I think that a mechanical format would be the best.
> >On a side note, not knowing too much about diesels, how about a propane
> >injection instead of the turbo. I am not sure how well they work on a N/A
> >deisel but I know that on a turo diesel they make phenomenal gains in hp
> >and
> >
> >esp torque.
> >Justin
> >
> >
> > >From: Pat Ford <pford at qnx.com>
> > >Reply-To: diy_efi at diy-efi.org
> > >To: diy_efi at diy-efi.org
> > >Subject: RE: Wierd application, hypothetical question.
> > >Date: Tue, 5 Dec 2000 14:50:57 -0500 (EST)
> > >
> > >use a waste gate controller its already designed to work at boost
> >pressures
> >
> > >in an automotive temp range and the use springs and levers to make your
> > >curves. Once again are you sure you need to do this?
> > >
> > >Previously, you (Shirley, Mark R) wrote:
> > >{ That's a perfectly reasonable thought.  I just thought it would be 
>much
> > >{ easier
> > >{ to tune with some sort of controller.  If I went pure mechanical, 
>sure
> >it
> > >{ would
> > >{ work, but i would have to have a lathe, and play around with many
> > >different
> > >{ springs
> > >{ to tune it, (not user-friendly) and the worst part of it is coming up
> > >with
> > >{ some sort of diaphragm.  The rest of it I could deal with, but the
> > >diaphragm
> > >{ is tough.
> > >{ You almost have to know somebody somewhere who makes these things.  
>It
> > >would
> > >{ have
> > >{ to be a rubber with a metal disc applied to seat the spring on.
> > >{ Not to mention that a controller would be a much cooler way to do it.
> > >Much
> > >{ more tunable.
> > >{
> > >{ -----Original Message-----
> > >{ From: justin ivan [mailto:vlkslvr at hotmail.com]
> > >{ Sent: Tuesday, December 05, 2000 11:34 AM
> > >{ To: diy_efi at diy-efi.org
> > >{ Subject: Re: Wierd application, hypothetical question.
> > >{
> > >{
> > >{
> > >
> > >
> > >--
> > >Pat Ford                           email: pford at qnx.com
> > >QNX Software Systems, Ltd.           WWW: http://www.qnx.com
> > >(613) 591-0931      (voice)         mail: 175 Terence Matthews
> > >(613) 591-3579      (fax)                 Kanata, Ontario, Canada K2M 
>1W8
> > >
> >
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